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本文是日本遥感技术中心专职理事酒井忠二三于1987年5月19日在经济团体联合会宇宙开发推进会上讲演的第二、三、四部分概要。
This article is the summary of the second, third and fourth parts of the lectures given by Sakai Nakayama, full time director of Japan Remote Sensing Technology Center, at the Symposium on the Promotion of Universe Development of the Economic Associations held on May 19, 1987.